These momentary switches must have the smallest footprint of any 16mm switches I`ve seen. The big brother of the MSW-1202.
This model has a slightly raised actuator so identical to the MSW-1601 except the actuator is proud of the bezel.
The action is clicky too so much like a tactile switch. They are made of stainless steel and ooze quality. Perfect for tight builds where you want a 16mm switch.